GKFix MCQ Question

What is the correct expression for Qc for the reaction NH4Cl(s) ⇌ NH3(g) + HCl(g)?

• A. Qc = [NH4Cl] / ([NH3][HCl])
• B. Qc = [NH3] / ([NH4Cl][HCl])
• C. Qc = [HCl] / ([NH3][NH4Cl])
• D. Qc = [NH3][HCl]